18TH LETTER OF THE GREEK ALPHABET Crossword Clue
18TH LETTER OF THE GREEK ALPHABET Crossword Clue
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Crossword Puzzle Infos
The 18th letter of the Greek alphabet is SIGMA (Σ). SIGMA is a consonant and is pronounced as a 's' sound. It is the first letter of the word 'σωμα' which means body in Greek. SIGMA is also used in mathematics and science to represent various concepts such as summation, surface charge density, and standard deviation.